<template>
    <div class="goods-info">

        <!-- 商品展示图 -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper :imgList="goodsinfo.album"></swiper>
                </div>
            </div>
        </div>
        <!-- 购物车小球动画 -->
        <transition @before-enter="beforeEnter" @enter="enter" @after-enter="afterEnter">
            <div class="ball" v-show="ballFlag" ref="ball"></div>
        </transition>

        <!-- 商品购买区域 -->
        <div class="mui-card">
            <div class="mui-card-header">{{ goodsinfo.name }}</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p class="price">
                        定价：<span>¥{{ goodsinfo.price }}</span>
                    </p>
                    <div v-if="goodsinfo.num">
                        <p class="go-num">
                            购买数量
                            <numbox @count="countChange" :max="goodsinfo.num" initcount="1" :goodsid="goodsinfo.id">
                            </numbox>
                        </p>

                        <p class="go-buy">
                            <mt-button type="primary" size="small" @click="buy">立即购买</mt-button>
                            <mt-button type="danger" size="small" @click="addShopcart">加入购物车</mt-button>
                        </p>
                    </div>
                    <div v-else>该商品暂时无货</div>
                </div>
            </div>
        </div>
        <!-- 商品参数区域 -->
        <div class="mui-card">
            <div class="mui-card-header">商品参数</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p>商品卖点：{{ goodsinfo.sell_point }}</p>
                    <p>库存情况：{{ goodsinfo.num }}件</p>
                    <p>上架时间：{{ goodsinfo.create_time }}</p>
                </div>
            </div>
            <div class="mui-card-header">商品详情</div>
            <div class="good-desc">
                <div class="content" v-html="goodsinfo.content"></div>
            </div>
        </div>
    </div>
</template>
  
<script>
import swiper from '../../components/swiper.vue'
import numbox from '../../components/numbox.vue'
export default {
    props: ['id'],
    data () {
        return {
            goodsinfo: {},    // 获取到的商品信息
            selectedCount: 1, ballFlag: false,   // 控制小球的显示和隐藏
        }
    },

    created () {
        this.getGoodsInfo()
    },
    methods: {
        buy () {
            this.$store.commit('shopcart/setBuy', { id: this.$props.id, count: this.selectedCount })
            this.$router.push({ name: 'order_create' })
        },

        getGoodsInfo () {
            this.$indicator.open({
                text: '加载中'
            })
            let params = { id: this.id }
            this.$http.get('goodsinfo', { params: params }).then(res => {
                this.$indicator.close()
                window.console.log(res.data)
                if (res.data.code === 0) {
                    this.$toast(res.data.msg)
                } else if (res.data.code === 1) {
                    if (res.data.data) {
                        this.goodsinfo = res.data.data
                    } else {
                        this.$messagebox.alert('商品不存在').then(() => {
                            this.$router.go(-1)
                        })
                    }
                } else {
                    this.$toast('加载失败，服务器异常')
                }

            })
        },
        countChange (goodsinfo) {
            window.console.log(goodsinfo)
            this.selectedCount = goodsinfo.count
        },
        addShopcart () {
            this.ballFlag = !this.ballFlag
            this.$store.commit('shopcart/addCar', {
                id: this.id,
                count: this.selectedCount,
                selected: true
            })
        },
        beforeEnter (el) {
            el.style.transform = 'translate(0,0)'
        },
        // 小球动画-进入
        enter (el, done) {
            el.offsetWidth // 必须加上此行代码，否则没有动画效果
            // 获取小球在页面中的位置
            const ballPosition = this.$refs.ball.getBoundingClientRect();
            // 获取徽标在页面中的位置
            const badgePosition = document.getElementById('badge').getBoundingClientRect()
            const xDist = badgePosition.left - ballPosition.left
            const yDist = badgePosition.top - ballPosition.top
            el.style.transform = `translate(${xDist}px,${yDist}px)`;
            el.style.transition = 'all .5s cubic-bezier(.4, -0.3, 1, .68)'
            done()
        },
        // 小球动画-进入后
        afterEnter () {
            this.ballFlag = !this.ballFlag
        }


    }, components: {
        swiper,
        numbox
    },


}
</script>
<style lang="scss" scoped>
.goods-info {
    background: #f1f1ff;
    overflow: hidden;

    .ball {
        width: 15px;
        height: 15px;
        border-radius: 50%;
        position: absolute;
        background: red;
        z-index: 99;
        left: 132px;
        top: 390px;
        transform: translate(93px, 230px)
    }

    .go-num {
        div {
            margin-left: 10px;
        }
    }

    .price {
        span {
            color: red;
            font-size: 14px;
            font-weight: bold;
        }
    }

    .go-buy {
        display: flex;
        margin: 10px 0 0px;
        justify-content: center;

        button {
            margin: 0 5px;
        }
    }

    .good-desc {
        background: #fff;
        padding: 5px;

        h3 {
            font-size: 16px;
            color: #226aff;
            text-align: center;
            margin: 15px 0;
        }

        .content {
            font-size: 14px;
            line-height: 28px;

            img {
                width: 100%;
            }
        }
    }

    .go-num {
        div {
            margin-left: 10px;
        }
    }

}
</style>
  
